As well as being an actress, Tanaka is also a singer. Tanaka has released three albums: Garnet, 24 Wishes and Kokoro, but did not gain much success. Tanaka is also a member of the Steel Angels, a singing trio composed of the three lead voice actors of Steel Angel Kurumi, together with Atsuko Enomoto and Masayo Kurata. Tanaka published a photo collection called Irodorie in May 2009.

Tanaka married fellow Japanese voice actor Kōichi Yamadera on June 17, 2012.[6] She had a fan club called Cafe de Rie that ran until 2012.[7] On June 23, 2013, a man with a knife intruded a Neptunia promotion where Tanaka was present,[8] yelling "Give me Tanaka! I am the victim!" In the hustle Tanaka fell and bruised her knee. After the incident, she took a break from Twitter.[9][10][11] and later returned in 2015.[12]